70220879 has 2 divisors, whose sum is σ = 70220880. Its totient is φ = 70220878.

The previous prime is 70220837. The next prime is 70220923. The reversal of 70220879 is 97802207.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70220879 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70220819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35110439 + 35110440.

It is an arithmetic number, because the mean of its divisors is an integer number (35110440).

Almost surely, 2^70220879 is an apocalyptic number.

70220879 is a deficient number, since it is larger than the sum of its proper divisors (1).

70220879 is an equidigital number, since it uses as much as digits as its factorization.

70220879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 70220879 is about 8379.7899138344. The cubic root of 70220879 is about 412.5615535938.

The spelling of 70220879 in words is "seventy million, two hundred twenty thousand, eight hundred seventy-nine".